Abstract: A system for protecting an operator (110) of a power tool may include a first set of wearable sensors (120) worn by the operator (110), a second set of wearable sensors (130) worn by the operator (110), a first tool sensor (122) disposed at the power tool where the first tool sensor (122) is configured to communicate with the first set of wearable sensors (120), a second tool sensor disposed (132) at the power tool where the second tool sensor (132) is configured to communicate with the second set of wearable sensors (130), and a controller (140). The controller (140) may be configured to determine, based on distances between the first tool sensor (122) and the first set of wearable sensors (120) and between the second tool sensor (132) and the second set of wearable sensors (130), whether to initiate a protective action with respect to the power tool.

Abstract: A chainsaw (100) includes a power unit and a working assembly powered responsive to operation of the power unit. The working assembly includes a guide bar (120) around which a chain is rotatable. The guide bar (120) includes a first side plate (200) and a second side plate (210) facing each other and extending away from the housing (110) to a nose of the guide bar (120), the first and second side plates (200 and 210) each including an inner sidewall (224 and 222) facing inwardly toward each other. Each of the inner sidewalls (224 and 222) includes a recessed portion (230) at which material of the inner sidewalls (224 and 222) has been removed.

Abstract: A cutting chain for a chainsaw may include a plurality of drive links, and a plurality of cutter links. Each of the drive links includes a top portion and a bottom portion that interfaces with a guide bar of the chainsaw. The cutter links are operably coupled to respective ones of the drive links at the top portion thereof. At least one of the cutter links includes a base portion and a cutting portion extending away from the base portion. The cutting portion includes a side plate and a top plate, the top plate including a top face and a bottom face. The side plate includes an outer face and an inside face. Multiple coating materials are provided on respective different surfaces of the drive links or cutter links such that different coating materials are applied based on a wear context of the respective different surfaces.

Abstract: A chainsaw (100) includes a power unit and a working assembly powered responsive to operation of the power unit. The working assembly includes a guide bar (120) around which a chain is rotatable. The guide bar (120) includes a laminated structure in which different ones of the layers of the laminated structure are comprised of different materials.

Abstract: A chainsaw (100) includes a power unit and a working assembly powered responsive to operation of the power unit. The working assembly includes a guide bar (120) around which a chain is rotatable. The guide bar (120) includes a first side plate (200) and a second side plate (210) facing each other and extending away from the housing (110) to a nose of the guide bar (120), the first and second side plates (200 and 210) each including an inner sidewall (224 and 222) facing inwardly toward each other. Each of the inner sidewalls (224 and 222) includes a recessed portion (230) at which material of the inner sidewalls (224 and 222) has been removed.

Abstract: A chainsaw (100) includes a power unit and a working assembly powered responsive to operation of the power unit. The working assembly includes a guide bar (120) around which a chain is rotatable. The guide bar (120) includes a laminated structure in which different ones of the layers of the laminated structure are comprised of different materials.

Abstract: A cutting chain (300) for a chainsaw (100) may include a plurality of drive links (310) and a plurality of side links (320). The drive links (310) are arranged to lie in a plane parallel to a plane in which a guide bar (120) about which the chain (300) is rotatable lies. The side links (320) are operably coupled to respective ones of the drive links (310) and are oriented to lie in respective planes substantially parallel to the plane. At least some of the side links (320) include cutting portions. The drive links (310) and side links (320) are attached to each other by rivets (360), and the rivets (360) have a longitudinal length that is less than or equal to a width of the side links (320) in a transverse direction.

Abstract: A method of modifying a cutter link (240) of cutting chain for a chainsaw may include forming the cutter link (240) to include a base portion (280) and a cutting portion (270) extending away from the base portion (280). The cutting portion (270) may include a side plate (300) and a top plate (310). The top plate (310) may include a top face (316) and a bottom face (314). The side plate (300) may include an outer face and an inside face (304). The method may further include determining a maximum non-homogeneous material hardness expected to be encountered during cutting operations, selecting a coating material having a hardness at least 1.3 times the maximum non-homogeneous material hardness, and coating a treated surface of the top plate (310) and/or the side plate (300).

Abstract: A cutting chain 200 for a chainsaw 100 may include a plurality of drive links 210, and a plurality of cutter links 240. Each of the drive links 210 includes a top portion and a bottom portion that interfaces with a guide bar 120 of the chainsaw 100. The cutter links 240 are operably coupled to respective ones of the drive links 210 at the top portion thereof. At least one of the cutter links 240 includes a base portion 280 and a cutting portion 270 extending away from the base portion 280. The cutting portion 270 includes a side plate 300 and a top plate 310, the top plate 310 including a top face 316 and a bottom face 314. The side plate 300 includes an outer face and an inside face 304. Multiple coating materials are provided on respective different surfaces of the drive links 210 or cutter links 240 such that different coating materials are applied based on a wear context of the respective different surfaces.

Abstract: A method of modifying a cutter link (240) of cutting chain (200) for a chainsaw (100) may include forming the cutter link (240) to include a base portion (280) and a cutting portion (270) extending away from the base portion (280). The cutting portion (240) may include a side plate (300) and a top plate (310). The top plate (310) may include a top face (316) and a bottom face (314). The side plate (300) may include an outer face (305) and an inside face (304). The method may further include diffusing a diffusion agent into material of the top plate (310) and/or the side plate (300) at a treated surface of the top plate (310) and/or side plate (300).

Abstract: A method of modifying a cutter link (240) of cutting chain (200) for a chainsaw (100) may include forming the cutter link (240) to include a base portion (280) and a cutting portion (270) extending away from the base portion (280). The cutting portion (270) may include a side plate (300/500) and a top plate (310/510). The top plate (310/510) may include a top plate leading edge (312/412/512) and a bottom face (314/414/514). The side plate (300/500) may include a side plate leading edge (302/402/502) and an inside face (304/404/504). The method may further include removing at least a portion of material forming the bottom face (314/414/514). The portion of material forming the bottom face (314/414/514) that is removed decreases as distance from the top plate leading edge (312/412/512) increases.